Archive: Coal

Clean Coal: Clean Coal Technology Is Not an Oxymoron

In the late 1980s, the U.S. Department of Energy (DOE), in conjunction with industry and state agencies, started the Clean Coal Technology (CCT) program. The aim of the CCT program was to develop technologies, increase efficiency, and reduce the environmental effects of burning coal in power plants. Today, pollution controls for new and existing plants […]

Controls: Building the Digital Power Plant of the Future

History has shown that the proper deployment of automation on new construction projects can make the difference between a moderate performer and an industry-leading unit, between average financial results and accelerated profitability. Given the magnitude of a new coal-fired plant construction project, automation is often viewed as just one of the many components essential to […]

Coal Users Community: NCTA helping to resolve coal transportation infrastructure problems

The Mission of the National Coal Transportation Association (NCTA) is to provide education and facilitation for the resolution of coal transportation issues in order to serve the needs of the general public, industry, and all modes of transportation. This is accomplished through the sponsoring of educational forums and by providing opportunities for the lawful exchange […]

Designing and maintaining steam coil air preheaters for reliability and effectiveness

If engineered well and drained properly, a simple finned-tube heat exchanger can help maximize a fossil-fueled power plant’s combustion efficiency, capacity, and air pollution reduction. Use the guidelines in this article either to return a disabled steam coil air preheater to service or to improve the performance of a unit that may have been wasting […]

How accurate primary airflow measurements improve plant performance

Primary airflow has a major impact on the efficiency, capacity, and cleanliness of pulverized coal–fired generation. Inaccurate measurements that underestimate primary airflow levels can lead to negative operational outcomes that include increased boiler gas temperatures, flyash loss-on-ignition, excessive NOx emissions, and higher-than-necessary fan power consumption. We remind you how to avoid those headaches.

Curbing the blue plume: SO3 formation and mitigation

Understanding why stack emissions become opaque leads to better choices of systems for controlling SO3 and other pollutants, based on current and future plant operating configurations.

Preparation keyed Entergy’s responses to Katrina, Rita

With the 2006 hurricane season about to begin, climatologists are predicting that the Atlantic Ocean will spawn 17 “named” storms this summer and fall, with 9 categorized as hurricanes and 5 expected to be “intense.” Whether or not your plant lies in a vulnerable coastal area, you’d do well to learn a few lessons from Entergy’s unique experience last year.

Why new U.S. supercritical units should consider T/P92 piping

T/P92 is being heralded as a superior and lower-cost alternative to T/P91 for new power plants with pressures above 3,600 psi and temperatures above 1,100F—such as the supercritical and ultra-supercritical units proposed to be built in the U.S. over the next few years. The switch from T/P91 to T/P92 would represent the next step in […]

Big bucks for carbon sequestration

The California Energy Commission (CEC) recently awarded about $14 million for carbon sequestration projects to be overseen by the West Coast Regional Carbon Sequestration Partnership. Westcarb, as the partnership is known, is part of the U.S. DOE’s effort to deploy technologies through its Regional Carbon Sequestration Partnership (RCSP) program. New members Alberta and British Columbia […]

Designing wet duct/stack systems for coal-fired plants

A multitude of variables must be accounted for during the design and development of a wet-stack flue gas desulfurization system. The five-phase process detailed below has proven effective on more than 60 wet-stack system design studies. A basic understanding of these concepts will help inform early design decisions and produce a system amenable to wet operation.